A ground stop affected American Airlines on Tuesday, bringing all flights that had not already taken off to a halt. ABC News said the issue was an “IT outage,” according to an FAA advisory they had viewed. In an X post, American Airlines said on Tuesday evening that the IT outage was starting to be resolved, and that at least some flights were taking off again. We put a temporary ground stop in place while our teams worked to resolve the issue. Gizmodo reached out to American Airlines for updates, but did not immediately hear back.